CA1064615A - Phase equalized readback apparatus and methods - Google Patents

Phase equalized readback apparatus and methods

Info

Publication number
CA1064615A
CA1064615A CA266,528A CA266528A CA1064615A CA 1064615 A CA1064615 A CA 1064615A CA 266528 A CA266528 A CA 266528A CA 1064615 A CA1064615 A CA 1064615A
Authority
CA
Canada
Prior art keywords
signal
phase
readback
adjustment
signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA266,528A
Other languages
English (en)
French (fr)
Inventor
Hjalmar H. Ottesen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of CA1064615A publication Critical patent/CA1064615A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
CA266,528A 1975-11-24 1976-11-24 Phase equalized readback apparatus and methods Expired CA1064615A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/634,800 US4005477A (en) 1975-11-24 1975-11-24 Phase equalized readback apparatus and methods

Publications (1)

Publication Number Publication Date
CA1064615A true CA1064615A (en) 1979-10-16

Family

ID=24545231

Family Applications (1)

Application Number Title Priority Date Filing Date
CA266,528A Expired CA1064615A (en) 1975-11-24 1976-11-24 Phase equalized readback apparatus and methods

Country Status (9)

Country Link
US (1) US4005477A (it)
JP (1) JPS5913089B2 (it)
CA (1) CA1064615A (it)
DE (1) DE2644013A1 (it)
FR (1) FR2332576A1 (it)
GB (1) GB1513484A (it)
IT (1) IT1074067B (it)
NL (1) NL7613017A (it)
SE (1) SE415941B (it)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2813207A1 (de) * 1978-03-25 1979-10-04 Bosch Gmbh Robert System zur korrektur von signalen, welche frequenzmoduliert von einem aufzeichnungstraeger abgenommen werden
US4191976A (en) * 1978-09-26 1980-03-04 Data General Corporation Circuit indicating phase relationship
JPS5715207A (en) * 1980-07-03 1982-01-26 Victor Co Of Japan Ltd Frequency-characteristic correction device of rotary information recording medium reproducing device
US4580176A (en) * 1983-11-21 1986-04-01 International Business Machines Corporation Adaptive equalization circuit for magnetic recording channels utilizing signal timing
JPS6171470A (ja) * 1984-09-14 1986-04-12 Olympus Optical Co Ltd 波形等化回路
US4615037A (en) * 1985-01-29 1986-09-30 Ampex Corporation Phase scatter detection and reduction circuit and method
GB2199470B (en) * 1986-12-31 1991-01-30 Racal Recorders Ltd Electrical circuit arrangements
JPH01229516A (ja) * 1988-03-10 1989-09-13 Sony Corp 自動等化器
JP2550772B2 (ja) * 1990-10-26 1996-11-06 日本ビクター株式会社 光学的情報記録媒体円盤の再生装置
JPH10188482A (ja) * 1996-10-29 1998-07-21 Sony Corp デジタル信号再生回路およびデジタル信号再生方法
JPH11219566A (ja) 1997-11-28 1999-08-10 Matsushita Electric Ind Co Ltd ディジタルデータ再生装置および再生信号二値化レベル補正方法
US6895349B2 (en) * 2000-11-09 2005-05-17 Tektronix, Inc. Gate comparator
US7688887B2 (en) * 2003-09-02 2010-03-30 Gennum Corporation Precision adaptive equalizer
JP2019097080A (ja) * 2017-11-24 2019-06-20 富士通株式会社 信号再生回路、光モジュール及び信号再生方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253237A (en) * 1961-03-10 1966-05-24 Data Control Systems Inc Frequency modulated oscillator
US3181133A (en) * 1961-05-29 1965-04-27 Electro Mechanical Res Inc Tape-speed compensation utilizing phase-locked loop detectors for use in telemetering systems
US3488452A (en) * 1965-05-24 1970-01-06 Astrodata Inc Record speed compensation for systems for processing recorded information
US3938184A (en) * 1975-03-21 1976-02-10 The United States Of America As Represented By The Secretary Of The Navy Digital flutter reduction system

Also Published As

Publication number Publication date
GB1513484A (en) 1978-06-07
DE2644013A1 (de) 1977-05-26
US4005477A (en) 1977-01-25
SE415941B (sv) 1980-11-10
NL7613017A (nl) 1977-05-26
FR2332576B1 (it) 1978-12-15
JPS5913089B2 (ja) 1984-03-27
FR2332576A1 (fr) 1977-06-17
IT1074067B (it) 1985-04-17
SE7613026L (sv) 1977-05-25
JPS5265414A (en) 1977-05-30

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